A damping device capable of automatically adjusting damping force

Abstract

A kind of damping device of automatically adjustable damping force, by being arranged in the oil cylinder of coaxial setting cylinder one and cylinder two.It is equipped with gas piston, isolation piston, limit piston, adjusting piston and damping piston in the oil cylinder.Gas piston, limit piston and damping piston are fixedly connected with piston rod, the rest piston is slidably connected with piston rod, adjusting piston is equipped with damping hole three, damping piston is equipped with damping hole four, damping hole five and damping hole six, wherein damping hole four and damping hole six are coaxially arranged with damping hole three on adjusting piston, damping piston can be combined with adjusting piston and separated with the change of tension size at the two ends of cylinder one and cylinder two, by combining and separating, the closure and conduction of damping hole five on damping piston are realized, the size of automatically adjustable damping force is realized, simple structure, automatic adjustment is fast, convenient and reliable.

Description

Technical Field

[0001] This invention relates to a damping device, and more particularly to a damping device that can automatically adjust the damping force. Background Technology

[0002] Currently, there are two main types of damping devices that can automatically adjust the damping force. One type uses a detection element to detect information feedback and automatically adjust the damping force. The other type uses a pressure regulating valve located on the damping orifice of the cylinder piston to automatically open and close according to changes in the pressure inside the cylinder, thereby automatically adjusting the damping force. Both types of damping devices have complex structures and high manufacturing costs. Furthermore, the former requires a power supply and has high requirements for the working environment. Summary of the Invention

[0003] To address the shortcomings of existing damping devices with automatically adjustable damping force, this invention provides a damping device with automatically adjustable damping force, comprising a first cylinder and a second cylinder coaxially arranged and slidable relative to each other. Each of the first and second cylinders has a cover plate with a threaded hole fixed to one end. A connecting rod is axially fixed to each of the cover plates. The other end of the connecting rod fixed to the cover plate is connected to a flange second located inside the second cylinder, and the other end of the connecting rod fixed to the cover plate is connected to a flange first located inside the first cylinder. A spring is provided on the connecting rod between flanges first and second. A hydraulic cylinder is provided between flanges first and second. The hydraulic cylinder includes a cylinder body. The cylinder body is characterized by being composed of a first cylinder body and a second cylinder body sealed together. One end of the cylinder body is fixed to flange first and equipped with an air valve. The other end of the cylinder body has a piston rod connected to flange second, and the piston rod is sealed by a cylinder head. The cylinder body contains an air piston, an isolation piston, a limit piston, and an adjusting piston. The cylinder comprises a pneumatic piston, a limiting piston, and a damping piston. The pneumatic piston, limiting piston, and damping piston are fixedly connected to the piston rod. An isolating piston is slidably and sealingly connected to the piston rod. An adjusting piston is slidably connected to the piston rod. The adjusting piston has a third damping hole with stepped holes at both ends. A sealing ring is provided on the outer circumference of the adjusting piston to fix it within the cylinder body. The damping piston has a fourth, fifth, and sixth damping hole. A one-way valve is provided on the fourth damping hole. The fourth and sixth damping holes are coaxially aligned with the third damping hole on the adjusting piston. The pneumatic piston, isolating piston, limiting piston, adjusting piston, and damping piston divide the cylinder body into cylinder chamber one, cylinder chamber two, cylinder chamber three, cylinder chamber four, adjusting cylinder chamber, and cylinder chamber five. Cylinder chamber one contains compressed gas, cylinder chamber two contains compressed gas and hydraulic oil, and cylinder chambers three, four, adjusting cylinder chamber, and cylinder chamber five contain hydraulic oil.

[0004] Furthermore, the gas piston is provided with a damping orifice.

[0005] Furthermore, the isolation piston is equipped with a refueling valve.

[0006] Furthermore, the limiting piston is provided with a second damping hole.

[0007] The beneficial effects of this invention are: it can automatically adjust the damping force in real time according to the magnitude of the externally applied tension; the damping force is large, so that the protected object will not be pulled down by the ever-increasing external force; the structure is simple and the manufacturing cost is low; the automatic adjustment is fast, convenient and reliable, and the real-time automatic response is fast; and it can work reliably for a long time in harsh environments. Attached Figure Description

[0008] Figure 1 This is a longitudinal cross-sectional view of the present invention.

[0009] Figure 2 for Figure 1 AA cross-sectional view of the adjusting piston.

[0010] Figure 3 for Figure 1 BB cross-sectional view of a medium-damped piston.

[0011] Figure 4 for Figure 1 CC cross-section of the gas piston.

[0012] Figure 5 for Figure 1 DD cross-sectional view of the middle limit piston.

[0013] In the diagram: 1. Cylinder 1, 2. Cylinder 2, 3. Cover Plate 1, 4. Cover Plate 2, 5. Connecting Rod, 6. Flange 1, 7. Flange 2, 8. Spring, 9. Cylinder 1, 10. Cylinder 2, 11. Gas Injection Valve, 12. Piston Rod, 13. Cylinder Head, 14. Gas Piston, 15. Isolation Piston, 16. Limiting Piston, 17. Adjusting Piston, 18. Damping Piston, 19. Cylinder Chamber 1, 20. Cylinder Chamber 2, 21. Cylinder Chamber 3, 22. Cylinder Chamber 4, 23. Adjusting Cylinder Chamber, 24. Cylinder Chamber 5, 25. Damping Hole 1, 26. Gas Injection Valve, 27. Damping Hole 2, 28. Damping Hole 3, 29. Sealing Ring, 30. Damping Hole 4, 31. Damping Hole 5, 32. Damping Hole 6, 33. Check Valve. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below:

[0015] like Figures 1-5As shown, a damping device with automatically adjustable damping force includes a coaxially arranged, relatively sliding cylinder 1 and cylinder 2. One end of each cylinder 1 and cylinder 2 is fixed with a cover plate 3 and a cover plate 4, each with a threaded connection hole. A connecting rod 5 is axially fixed to each cover plate 3 and cover plate 4. The other end of the connecting rod 5 fixed to cover plate 3 is connected to a flange 7 located inside cylinder 2, and the other end of the connecting rod 5 fixed to cover plate 4 is connected to a flange 6 located inside cylinder 1. A spring 8 is provided on the connecting rod 5 between flange 6 and flange 7. A hydraulic cylinder is provided between flange 6 and flange 7. The hydraulic cylinder includes a cylinder body. The cylinder body is characterized by being composed of a cylinder body 9 and a cylinder body 10 sealed together, with one end of the cylinder body fixed to flange 6. The cylinder body has a gas filling valve 11 at one end for filling compressed gas into cylinder chamber 19 and cylinder chamber 20. The other end of the cylinder body has a piston rod 12 connected to flange 2. The piston rod 12 is sealed by cylinder cover 13. When the cover plates 3 and 4 of cylinder chambers 1 and 2 are pulled by an external force, the piston rod 12 is pressed to move in the forward direction. The cylinder body contains a gas piston 14, an isolation piston 15, a limiting piston 16, an adjusting piston 17, and a damping piston 18. The gas piston 14, limiting piston 16, and damping piston 18 are fixedly connected to the piston rod 12. The isolation piston 15 is slidably and sealingly connected to the piston rod 12. The adjusting piston 17 is slidably connected to the piston rod 12. The adjusting piston 17 has a damping hole 28. The damping orifice 28 has stepped holes at both ends to increase the communication range. The outer circumference of the adjusting piston 17 has a sealing ring 29 that relatively fixes the adjusting piston 17 within the cylinder. "Relatively fixing the adjusting piston 17 within the cylinder" means that the adjusting piston 17 is fixed within the cylinder and will not move except when combined with the damping piston 18 or the limiting piston 16 to move it. The damping piston 18 has damping orifices 30, 31, and 32. A one-way valve 33 is provided on damping orifice 30. When the damping piston 18 moves forward with the piston rod 12, the one-way valve 33 closes, and damping orifice 30 also closes and is not conductive. When the damping piston 18 moves backward with the piston rod 12... When the damping piston 18 and the regulating piston 17 are combined into one, the damping hole 30 and the damping hole 32 are coaxially arranged corresponding to the damping hole 28 on the regulating piston 17. When the damping piston 18 and the regulating piston 17 are combined into one, the damping holes 30 and 32 are connected to the damping hole 28. Whether the damping hole 30 is connected depends on the opening and closing of the one-way valve 33. The damping hole 31 is a damping adjustment hole for automatically adjusting the damping force of the damping piston 18. When the damping piston 18 and the regulating piston 17 are combined into one and move, the damping hole 31 is closed by the end face of the regulating piston 17 and is not connected. The damping force of the damping piston 18 is automatically increased due to the reduction in the number of connected damping holes.The gas piston 14, isolation piston 15, limiting piston 16, adjusting piston 17, and damping piston 18 divide the cylinder body into cylinder chamber one 19, cylinder chamber two 20, cylinder chamber three 21, cylinder chamber four 22, adjusting cylinder chamber 23, and cylinder chamber five 24. Compressed gas is added to cylinder chamber one 19, compressed gas and hydraulic oil are added to cylinder chamber two 20, and hydraulic oil is added to cylinder chamber three 21, cylinder chamber four 22, adjusting cylinder chamber 23, and cylinder chamber five 24.

[0016] The gas piston 14 is provided with a damping hole 25. When the gas piston 14 moves with the piston rod 12, it generates an additional damping force to increase the total damping force of the damping piston 18.

[0017] The isolation piston 15 is equipped with a filling valve 26 for adding hydraulic oil to cylinder chamber 5 24, regulating cylinder chamber 23, cylinder chamber 4 22, and cylinder chamber 3 21.

[0018] The limiting piston 16 is provided with a damping hole 27. When the limiting piston 16 moves with the piston rod 12, it generates an additional damping force to increase the total damping force of the damping piston 18. At the same time, the limiting piston 16 restricts the relatively fixed position of the adjusting piston 17 within a specified range in the cylinder.

[0019] In the above-described design structure of a damping device capable of automatically adjusting damping force, when the tension applied to the ends of the cover plates 3 and 4 of cylinder 1 and cylinder 2 is small, the damping piston 18, the gas piston 14, and the limiting piston 16 move forward together with the piston rod 12. Except for the damping hole 30, which is not conductive, the damping holes 31 and 32 on the damping piston 18 are all conductive. Because of the large number of conductive damping holes, the damping piston 18 generates a force that adapts to smaller external tension. With a small damping force, if the small pulling force applied to both ends of cylinder 1 and cylinder 2 remains constant, the damping piston 18 will oscillate within a certain range between cylinder chamber 5 24 and adjusting cylinder chamber 23. If the pulling force applied to both ends of cylinder 1 and cylinder 2 continuously increases, the damping piston 18 will continue to move in the positive direction with the piston rod 12 and gradually approach the adjusting piston 17. The volume of adjusting cylinder chamber 23 will continuously decrease. When the volume of adjusting cylinder chamber 23 decreases to zero, that is, when the damping piston 18 and adjusting cylinder 23 are in equilibrium, the piston will oscillate within a certain range between cylinder chamber 5 24 and adjusting cylinder chamber 23. When the piston 17 and the damping piston 18 approach and finally combine into a whole, only the damping hole 32 on the damping piston 18 remains open. Due to the reduction of the open damping hole, the damping force of the damping piston 18 automatically increases, generating a new and larger resistance force to balance the increased tension. This resistance force then oscillates stably within a certain range between cylinder chamber 24 and cylinder chamber 22, preventing the protected object from being pulled down by the increased tension. When the tension applied to both ends of cylinder 1 and cylinder 2 gradually decreases, the damping piston 18 moves in the opposite direction with the piston rod 12. The damping hole 30 on the damping piston 18 becomes open again. Due to the increase of the open damping hole, the damping force of the damping piston 18 automatically decreases. As the damping piston 18 separates from the adjusting piston 17, the damping hole 31 on the damping piston 18 also becomes open again. As the number of open damping holes further increases, the damping force of the damping piston 18 further automatically decreases, thus achieving automatic balance with the gradually decreasing external tension.

[0020] The above description is only used to illustrate the technical solution of the present invention, and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, are all covered within the scope of the claims of the present invention.

Claims

1. A damping device with automatically adjustable damping force, comprising a first cylinder and a second cylinder coaxially arranged and slidable relative to each other, wherein a first cover plate and a second cover plate with connecting threaded holes are fixed to one end of each of the first cylinder and the second cylinder, and a connecting rod is axially fixed to each of the first cover plate and the second cover plate; the other end of the connecting rod fixed to the first cover plate is connected to a second flange disposed in the second cylinder, and the other end of the connecting rod fixed to the second cover plate is connected to a first flange disposed in the first cylinder; a spring is provided on the connecting rod between the first flange and the second flange; and a hydraulic cylinder is provided between the first flange and the second flange, wherein the hydraulic cylinder includes a cylinder body, characterized in that: The cylinder body is composed of cylinder body one and cylinder body two, which are sealed together. One end of cylinder body one is fixed to flange one and is equipped with a gas filling valve. The other end of cylinder body one is equipped with a piston rod connected to flange two, and the piston rod is sealed by a cylinder head. The cylinder body contains a gas piston, an isolation piston, a limiting piston, an adjusting piston, and a damping piston. The gas piston has a damping hole one, and the limiting piston has a damping hole two. The gas piston, limiting piston, and damping piston are fixedly connected to the piston rod. The isolation piston is slidably sealed to the piston rod, and the adjusting piston is slidably connected to the piston rod. The adjusting piston has a damping hole three, and the two ends of the damping hole three have stepped holes. The outer circle of the adjusting piston has a sealing ring that relatively fixes the adjusting piston in the cylinder body. "Relatively fixing the adjusting piston in the cylinder body" means that the adjusting piston, except for the damping piston or the limiting piston, is integrated with it. Besides being able to move, the adjusting piston is fixed in the cylinder and will not move further. The damping piston is provided with damping hole four, damping hole five and damping hole six. A one-way valve is provided on damping hole four. Damping holes four and six are coaxially arranged corresponding to damping hole three on the adjusting piston. When the damping piston and the adjusting piston move as a whole, damping hole five is closed by the end face of the adjusting piston and is not conductive. The damping force of the damping piston is automatically adjusted and increased due to the reduction in the number of conductive damping holes. The gas piston, isolation piston, limit piston, adjusting piston and damping piston divide the inner cavity of the cylinder into cylinder chamber one, cylinder chamber two, cylinder chamber three, cylinder chamber four, adjusting cylinder chamber and cylinder chamber five. Cylinder chamber one is filled with compressed gas, cylinder chamber two is filled with compressed gas and hydraulic oil, and cylinder chamber three, cylinder chamber four, adjusting cylinder chamber and cylinder chamber five are filled with hydraulic oil.

2. The damping device with automatically adjustable damping force according to claim 1, characterized in that: The isolation piston is equipped with a filling valve.

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